Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16551
Title: Processing and Mechanical Properties of Pure Mg and in-situ AlN Reinforced Mg-5Al Composite
Authors: MAUNG AYE THEIN
Keywords: Recycling, Nanostructured Mg, Aluminium Nitride, Composite, Mechanical milling, Mechanical properties
Issue Date: 28-May-2009
Source: MAUNG AYE THEIN (2009-05-28). Processing and Mechanical Properties of Pure Mg and in-situ AlN Reinforced Mg-5Al Composite. ScholarBank@NUS Repository.
Abstract: Recycled Mg chips were used to synthesize bulk nanocrystalline (nc) Mg composite, Mg-5wt%Al reinforced with 1wt% in-situ formed AlN, by mechanical milling and powder metallurgy route. Physical, thermal and mechanical properties of the composite were studied in comparison with nc pure Mg which was synthesized and tested with the same parameters as the composite. The tensile strength of the composite had been shown to be enhanced through grain refinement after short milling duration. Further milling to 40h exhibited decline in yield stress with enhanced ductility and softening behaviors. Two competitive deformation modes of grain boundary sliding and Coble creep seemed to be dominant in the room temperature deformation of the 40h-milled composite of crystalline size 33 nm. Useful insights into the microstructure evolution and mechanical properties of nc Mg composite have been achieved for practical applications through this study to correlate the grain refinement, texture, deformation parameters and deformation mechanisms.
URI: http://scholarbank.nus.edu.sg/handle/10635/16551
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